There are a bunch of ways to list and find things in terminal.
It sounds to me as though you are a realitive beginner to the Unix command line (as I was several months ago) so perhaps instead of giving you the answer to your question precisly it would be more helpful for me to show you how to figure this sort of thing out for yourself
The first thing you are going to need to familiarize yourselfe with is the "man" command.
man will get you the "manual page" for most any command that you are looking to use. You can also look them up online, but man is a good first hit, and generally will have all the info you need.
The command that you are going to be needing for this opperation are
ls
grep
Basically, you are going to want to list recursivly with the ls command, and than pipe the out put of that into grep to search for the charactor pattern "zend" that you are looking for.
Check it out. See how faryou get, and feel free to ask more questions. Learning this stuff is an investment that really does pay off.
B